Risk Assessment is the basis for almost all of our designs. Perceived risk is the basis for the rest of the designs. A good remediation design must incorporate the concentration goals for that site and the designer must know how those goals were set. In order to know how those goals were set, we all must have a basic understanding of Risk Assessment. Not just the numbers, but the methodology that ...
Project Details Harbor Point Engineer: Arcadis-U.S., Inc. Contractor: InterGeo Services, LLC Location Utica, New York, U.S.A Products Used Organoclay REACTIVE CORE MAT After dredging of a Utica, NY harbor was completed in 2010, investigations revealed residual concentrations of the primary constituents of concern, which included NAPL and PAHs. It was decided that a reactive ...
From The National Groundwater Association Most of you might question why I want to spend time discussing a subject that is outside of the more traditional subjects that would be reviewed in this column. After all, plumes are usually considered part of the hydrogeologist’s world. What is an engineer going to be able to bring to this discussion? Of course, the rest of you want to know why I ...
What is a Treatability Study? When done correctly, a treatability study can be an important component of the remedial investigation/feasibility study (RI/FS) and the remedial design/remedial action (RD/RA) process. Engineers use this tool to help identify the full range of remedial options that are available to their client regarding safe & cost-effective remedies in the market. Remedial ...
Computational cost is a critical issue for large-scale water resource optimization under uncertainty, since time-intensive Monte Carlo simulations are often required to evaluate over multiple parameter realizations. This paper presents an efficient approach for replacing most Monte Carlo simulations with efficient surrogate models within a noisy genetic algorithm (GA). The surrogates are trained ...
Contaminated soil is one that has heavy metals present within the project site. The EPA requires a Toxicity Characteristic Leaching Procedure (TCLP) test to determine if metal contaminated soil needs to be managed as hazardous or non-hazardous waste. Soils exhibiting hazardous characteristics need to be disposed of at a facility permitted for that material at a high cost. The alternative is to ...
GEA provided comprehensive site investigation, remediation design and remedial compliance services for the Sterling-Regal Hazardous Waste Site in Carlstadt, New Jersey. GEA prepared a remedial action workplan (RAW) for a large corporate printing company site in the New Jersey Meadowlands in accordance with NJDEPE requirements. The work also included:· soil ad groundwater ...
A mixed-integer non-linear programming (MINLP) with surrogate model was introduced to derive the optimal surfactant enhanced aquifer remediation (SEAR) process (remediation cost minimisation and removal rate maximisation) at a nitrobenzene-contaminated site. First, a 3D multi-phase flow simulation model was developed to simulate the SEAR process; using a radial basis function artificial neural ...
Project Description Unlike slope stability analysis software based on the limit equilibrium method, Itasca’s numerical modeling software (FLAC, FLAC3D) is capable of predicting multiple interacting failure mechanisms and produces the structural forces in the stabilization features. These capabilities are critical to developing engineering judgment and in designing remedial measures. OFFICE ...
Project Summary Industrial solvents were found in the ground water at a former industrial site on an unused airfield in New Jersey. The contamination was mainly found in ground water in thick coastal sediments. Prior to selection of a full-scale remedy, a pilot study was completed to verify the effectiveness of CL-Out bioremediation and to develop site-specific performance information for the ...
Industrial Facility, Tennessee An environmental assessment and remediation design project was conducted at a chemical manufacturing facility in eastern Tennessee. As part of the project, GeoView was asked to determine the depth to limestone bedrock underlying the project site and identify any suspected karst features within the upper portion of the limestone stratum. The general geological ...
Project: Sienna Place Homes Location: Philadelphia. PA Products: Liquid Boot Gas Vapor Mitigation System Background: A prominant residential developer had selected an idle Brownfield for the site of a large multi-family residential development. Challenge: To mitigate potential methane vapor intrusion concerns, Pennoni Associates and the general contractor selected the Liquid Boot"* gas vapor ...
How can we determine where groundwater is seeping into rivers and bays? Knowing seep locations can help with selecting sampling locations, identifying contaminant sources, determining whether contamination is historic or on-going, and designing remediation. Historically, methods for locating seeps have been limited. Due to cost, sampling can only be done at a few locations. This means we ...
Project: Mott Haven School Location: Bronx, NY Products: Liquid Boot® Gas Vapor Mitigation System Background: The Mott Haven School Campus was to be built on a former manufacturing site with residual contaminants in the soil. Challenge: The site for the school development underwent a series of environmental remediation procedures and concern over vapor migration of VOCs and BTEXs in the ...
Project Description In 2003, a landslide developed along the Red Lake river bank inside the city of Crookston, Minnesota. Although several attempts were made to solve the problem, in 2008, a second event occurred, and extensive instrumentation was then put in place to monitor the slope and gain a better understanding of the situation. In 2013, the Minnesota Department of Transportation issued a ...
Shield Environmental Associates (Lexington, KY) has faced some daunting challenges over many years of successful service to their clients, but this one was remarkable. The Problem: A 320 foot long dissolved BTEX plume in both shallow and deep zones in lithology very unfriendly to direct push sampling or injections. The Team: Shield Environmental Associates and RPI Group affiliates AST ...
The Loveland Sinclair gasoline station was selected for In-Situ Thermal Remediation (ISTR) using Gas Thermal Remediation (GTR) technologies. The GTR remediation system was designed to target a treatment area of approximately 14,000 square feet and includes a treatment volume of approximately 3,100 cubic yards. Vadose and saturated zone impacts, including a thin layer of light non-aqueous phase ...
A new concept for cleanup of contaminated properties and hazardous waste sites applicable under federal and state regulatory programs is helping clients achieve both business and regulatory goals at their sites. The concept, called 'Integrated Site Closure', is the seamless integration and delivery of services necessary to reach regulatory closure of contaminated properties. Regulatory closure ...
ABSTRACT BOS 100 was successfully implemented as part of a combined remedies strategy to treat elevated levels of Trichloroethylene in a shallow fine grained aquifer at a former large industrial facility. CHALLENGES A large industrial facility used vapor degreasing in the 1970s and 1980s that resulted in chlorinated volatile organic compound (CVOC) contamination of soil and groundwater. ...
The Pine Street Barge Canal Superfund Site is located along the coast of Lake Champlain. Sediments in the canal were contaminated by historic dumping of various materials including coal tar, solvents and petroleum products. Terra Contracting Services, LLC (Terra) was retained to implement the remedial design. Terra subcontracted with Global Environmental Engineering Inc. (Global) to provide ...